// /src/pages/hot/hot.vue
<script setup lang="ts">
import { onReady, onLoad } from '@dcloudio/uni-app'
import { getHotRecommendAPI } from '@/services/hot'
import type { subTypeItem } from '@/types/hot'
import { ref } from 'vue'
// 热门推荐页 标题和url
const hotMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '新鲜好物', url: '/hot/new' },
]
const query = defineProps<{
  //接受来自路径的query参数
  type: string
}>()

//找到hotMao与当前传入type值相同的数组
const curHotMap = hotMap.find((item) => item.type === query.type)
//动态设置标题
onReady(() => {
  uni.setNavigationBarTitle({ title: curHotMap!.title })
})

//广告图片路径
const bannerPicture = ref('')
//子类数据
const subTypes = ref<(subTypeItem & { finish?: boolean })[]>([])
//获取热门推荐模块的数据
const getHotRecommendData = async () => {
  const { result } = await getHotRecommendAPI(curHotMap!.url, {
    page: import.meta.env.DEV ? 30 : 1,
    pageSize: 10,
  })
  bannerPicture.value = result.bannerPicture
  subTypes.value = result.subTypes
}
//激活的tab索引
const activeIndex = ref(0)
onLoad(() => {
  getHotRecommendData()
})
//滚动触底时发请求获取新的数据
const onScrolltolower = async () => {
  //根据激活的索引拿到对应的子类数据
  const curSubtypes = subTypes.value[activeIndex.value]
  //判断当前页码数是否小于总页码数
  if (curSubtypes.goodsItems.page < curSubtypes.goodsItems.pages) {
    //让页码++
    curSubtypes.goodsItems.page++
  } else {
    //添加一个结束标记
    curSubtypes.finish = true
    //弹出轻提示
    return uni.showToast({ icon: 'none', title: '没有更多数据啦~' })
  }

  //发送请求并传递页码的参数
  const { result } = await getHotRecommendAPI(curHotMap!.url, {
    subType: curSubtypes.id,
    page: curSubtypes.goodsItems.page,
    pageSize: curSubtypes.goodsItems.pageSize,
  })
  //将新获得的子类数据保存下来
  const newCurSubtypes = result.subTypes[activeIndex.value]
  //在旧的子类items中追加新的子类，这时候定义的subTypes里的items数据更新引起页面重新渲染
  curSubtypes.goodsItems.items.push(...newCurSubtypes.goodsItems.items)
}
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="bannerPicture"></image>
    </view>
    <!-- 推荐选项 -->
    <view class="tabs">
      <text class="text" :class="{ active: index === activeIndex }" @tap="activeIndex = index" v-for="(item, index) in subTypes" :key="item.id">{{ item.title }}</text>
    </view>
    <!-- 推荐列表 -->
    <scroll-view @scrolltolower="onScrolltolower" scroll-y v-show="index === activeIndex" class="scroll-view" v-for="(sub, index) in subTypes" :key="sub.id">
      <view class="goods">
        <navigator hover-class="none" class="navigator" v-for="item in sub.goodsItems.items" :key="item.id" :url="`/pages/goods/goods?id=${item.id}`">
          <image class="thumb" :src="item.picture"></image>
          <view class="name ellipsis">{{ item.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ item.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text">{{ sub.finish ? '没有更多数据啦~' : '正在加载...' }}</view>
    </scroll-view>
  </view>
</template>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.scroll-view {
  flex: 1;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
  .symbol {
    font-size: 70%;
  }
  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>
